Hugo lampbecht



(No Model.) f H. LAMPRECHT.

. RGKING CHAIR. No. 286,449. Patented Oct. 9, 1888.

N. PETERS maman wmingvmac i NITED STATES ROCKlNG-CHAIR.

SPECIFICATION forming part of Letters Patent No. 286,449, dated October9, 1883.

Application mea February 5, issu. 'mt mmm.)

To a/ZZ. whom, t may concern.-

Beit known that I, HUGO LAMPREe-Hna citizen of the United States,residing at N ew York, in the State of New York, Vhave invented a newand' useful Improvement in Rocking Chaii s, of which the following is aspecification.`

. In the accompanying drawings, Figure l represents a section of myimproved rockingchair embodying my invention. Fig. ll shows the plateswith out the spring attachment.

Similar letters represent similar parts.

The nature of my invention consists in the arrangement of the springs,whereby the action of the same will be nearly always in the direct lineof the springs.

A is the lower or stationary part of the chair, and B the upper orrocking part of the same.

D is a plate attached to the lower part, A., and provided with a stud,n.

C is a plate attached to the upper or roeking part,- B, and provided atits lower end with an angular groove, m, in which the studn, attached tothe lower'plate, D, can work or move freely during the rocking of theupper part of the chair. By the length of this groove/m', the

motion of the upper part, B, of the chair is regulated in eitherdirection, and at the same time the necessary connection between theupper and lower part of the chair is obtained.

The lower plate, D, is provided likewise with two pins or studs, b b',and similar pins or studs, a a', are attached to the upper plate, C.

To a plate, P, four spiral springs, J J J2 J4, are attached oppositeeach other, Theends of thetwo upper springs, J J2, are attached 4to thestuds a a on the plate C, and the ends of the two lower springs, J J4,are attached to the studs?) b on the lower plate, D. The plate P forms aconnection between the spiral springs J J and between the springs Jz J4.By this arrangement of the springs J J and J2 J 4 diagonal to eachother, their center lines, or lines of action, are nearly at rightangles to the line of motion of the rocking part B of the chair, andthemotion of this part B will cause a direct action of said springs.

What I claim as my invention, and desire to secure by Letters Patent,is-

In combination with the stationary part A and the movable part B of arocking-chair, the plate D, with stud n and studs bb', plate C, withstuds a a and groove m in lower part, and the spiral springs J J J2J4,'with plate P, arranged to operate in the manner and for the purposedescribed.

HUGO LAMPREOHT.

Witnesses:

HENRY E. ROEDER, J. B. Norms.

